Display screen or portion thereof with an animated graphical user interface



FIG. 1 is a front view of a display screen or portion thereof with ananimated graphical user interface showing a first image in a sequenceshowing our new design;

FIG. 2 is a second image thereof;

FIG. 3 is a third image thereof;

FIG. 4 is a fourth image thereof; and,

FIG. 5 is a fifth image thereof.

The short dashed lines are part of the design. The dash dot linesrepresent a display screen and form no part of the claimed design. Theappearance of the transitional image sequentially transitions betweenthe images shown in FIGS. 1-5. The process or period in which one imagetransitions to another image forms no part of the claimed design.

CLAIM The ornamental design for an display screen or portion thereofwith an animated graphical user interface, as shown and described.